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Old 07-03-2010, 04:08 AM   #1
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Default Extra baffling for the oil pan.

I spent some time and made a baffle for my oil pan with hinged doors.

Seems to work, It definitely slows the slosh down. I filled it with a gallon of water to test it. The little hing doors slap shut when when the fluid sloshes forward. It sloshes a lot less with the added baffle than without it. It still seems to drain back into the lower part of the sump just a quick as ever.

Should help keep oil around the pickup under hard braking. I am not sure but I think I have seen some oil pressure fluctuation under hard braking. This cant hurt might help.

Bob
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Extra baffling for the oil pan.-p1010001.jpg   Extra baffling for the oil pan.-p1010003.jpg   Extra baffling for the oil pan.-p1010004.jpg   Extra baffling for the oil pan.-p1010005.jpg  

Last edited by bbundy; 07-03-2010 at 04:43 AM.
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Old 07-03-2010, 10:03 AM   #2
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I've definitely seen my oil pressure gauge dip to "uh oh" under hard braking on the track.

Nice little mod.
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Old 07-03-2010, 01:12 PM   #3
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I'd thought about doing that when I had the motor out and apart but in my rush to actually finish skipped it. Damn. Extra baffles are definetely a good idea. Good work.
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Old 07-03-2010, 05:26 PM   #4
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Very nice.

It is very similar to the Maruha one: http://chikaramotorsports.com/catalo...5&cat=1&page=2
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Old 07-03-2010, 05:40 PM   #5
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awww, those rubber flaps are so cute! How much is 110 CAD? Almost looks like he copied that design.
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Old 07-03-2010, 08:00 PM   #6
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Quote:
Originally Posted by curly View Post
awww, those rubber flaps are so cute! How much is 110 CAD? Almost looks like he copied that design.
I was heavily influenced by the Maruha design. Total materials on mine was about $6 US from parts sourced at Lowes though, thin pece of steel and a pair of hinges. The Chikara/Maruha one is about $95. I have seen those rubber flaps before I think they are OEM parts from something. In my research of pan baffles I saw them in some flaps in a BMW pan I think that looked just like them. My hinged flaps look more like some pans I have seen from Moroso.

Bob
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Old 07-03-2010, 08:39 PM   #7
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i took the easy route for once, and just bought the maruha unit, have it installed in my engine, and oil pressure seems very good
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Old 07-04-2010, 01:44 AM   #8
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Thats good work. I was also thinking about doing this just to cut down on slosh..
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Old 07-04-2010, 02:05 AM   #9
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These are common practice in the LS1 RX7 world. They sell for over 200 and Improved Racing can never keep them in stock!
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Old 07-04-2010, 02:21 AM   #10
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Should I be worried? I frequent a track that has a 120-20mph bus-stop.
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Old 07-04-2010, 10:47 AM   #11
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Yes, that oil pan design is extra baffling to me, indeed...

Sorry, we were all thinking it, someone had to say it...
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Old 07-04-2010, 04:04 PM   #12
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Miatas definitely suffer from oil starve under braking, I've seen my low pressure light go on more than a couple of times. Usually after a high-G corner that dumps straight into a hard braking zone, i.e. 8 into 9 at T-hill or 2 into 3 at calspeed.
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Old 07-06-2010, 07:18 PM   #13
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Quote:
Originally Posted by hustler View Post
Should I be worried? I frequent a track that has a 120-20mph bus-stop.
+1 on that question
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Old 07-08-2010, 01:37 PM   #14
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Quote:
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+1 on that question
High G corner that dumps into a hard braking zone seems to be worst case I think. Hard straight line braking doesn’t seem to be as bad, it is more of a rhythm thing going on than a pure steady state G-load I think got to get the motion of the ocean going.

Bob
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Old 07-09-2010, 05:14 PM   #15
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Nice baffle and fab skills!

I have a Maruha baffle, which is very similar.

Unfortunately, it doesn't fix the pressure drop in heavy straight-line braking, which is where I see 100% of the pressure drop.

Lateral g's do not effect oil pressure at all, in either direction.

The black trace is a recent datalog of my stock non-baffled, non-crank scraper engine. The red trace is a datalog from last year of my baffled & crank-scraped high-revving N/A engine.

Both show consistent pressure drops under the same conditions, though the baffled pressure drops are proportionally bigger. The difference in oil pressure from one engine to the next is due to different oils, different temps, and different engines. The two graphs do show that pressure drop under heavy braking does drop pressure significantly, regardless of having a baffle (red trace) or not (black trace).

Accusump anyone?

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Old 07-09-2010, 05:26 PM   #16
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This thread just became even more win.

Great data wildo, thank you.
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Old 07-09-2010, 06:44 PM   #17
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Damit now I’m thinking I need an Accusump.

Over rev error on a downshift under braking while having hardly any oil pressure could be really bad for rod bearings. I could easily se myself doing that.

Bob
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Old 07-10-2010, 03:58 PM   #18
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You do need an Accusump. I have a 2-quart model mounted under the trunk hinge. Put the weight kind of high, but at least it is back and near the center of yaw.

I love having oil pressure before I start the car and during hard braking too. Now if I could just get my fuel starvation in extended right hand turns solved.....

M
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Old 07-11-2010, 05:09 PM   #19
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Quote:
Originally Posted by MeOughtta View Post
You do need an Accusump. I have a 2-quart model mounted under the trunk hinge. Put the weight kind of high, but at least it is back and near the center of yaw.

I love having oil pressure before I start the car and during hard braking too. Now if I could just get my fuel starvation in extended right hand turns solved.....

M
How much hose did you use? I'm desperately trying to move weight to the rear of my car too. Will a 1qt accusump cut the mustard...especially considering the amount of oil in the extra-long line? Is the 1-way valve required? My oil system goes: pump-plate-cooler-filter-engine, so I'm not sure if I need it or not.

Also, can I stack a Mocal plate and one of these? That would make install too easy.
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Old 07-11-2010, 06:51 PM   #20
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Quote:
Originally Posted by hustler View Post
Will a 1qt accusump cut the mustard...especially considering the amount of oil in the extra-long line?
The line length does not matter so much. The amount of oil that will move back and forth is only determined by the displacement of the accusump.
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